1040139806 has 4 divisors (see below), whose sum is σ = 1560209712. Its totient is φ = 520069902.

The previous prime is 1040139799. The next prime is 1040139889. The reversal of 1040139806 is 6089310401.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260034950 + ... + 260034953.

It is an arithmetic number, because the mean of its divisors is an integer number (390052428).

Almost surely, 2^1040139806 is an apocalyptic number.

1040139806 is a deficient number, since it is larger than the sum of its proper divisors (520069906).

1040139806 is an equidigital number, since it uses as much as digits as its factorization.

1040139806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520069905.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 1040139806 is about 32251.1985203651. The cubic root of 1040139806 is about 1013.2048010692.

The spelling of 1040139806 in words is "one billion, forty million, one hundred thirty-nine thousand, eight hundred six".